package com.sky.interceptor;

import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpStatus;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {


    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

		//获取登录数据员工id
        String token = request.getHeader("authentication");

        if (token==null){
            response.setStatus(HttpStatus.SC_UNAUTHORIZED);
            return false;
        }
        Claims claims = JwtUtil.getClaimsBody(token);
        int i = JwtUtil.verifyToken(claims);
        //-1：有效，0：有效，1：过期，2：过期
        if (i==1||i==2){
            //发送401
            response.setStatus(HttpStatus.SC_UNAUTHORIZED);
            return false;
        }else {
            //获取用户的id
            Integer id = (Integer) claims.get("id");
            //存入ThreadLocal中  ThreadLocal是Thread的局部变量
            BaseContext.setCurrentId(id.longValue());
            return true;

        }

    }
}
